Event: C Division

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Opponent	Rating	Result
Michael J Creaney	1595	0 - 1
Matthew Rowett	1350	1 - 0
John Marsden	1350	0 - 1

performance = (sum(opponents ratings) + 400(wins-losses)) / games

1298 = (4295 + 400 * (1 - 2)) / 3)